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Medical

167. Identify the correct statements from the following: (a) $CO_2$ (M) is used as refrigerant for ice-cream and frozen food (b) The structure of $C_{60}$ contains twelve six carbon rings and twenty five carbon rings. (c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline. (d) CO is colorless and odourless gas.

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